Posted By

jamesming on 07/27/08

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date week

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SimonJ621

get date range from week number in year

/ Published in: JavaScript

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function getDateRangeOfWeek(weekNo){
		var d1 = new Date();
		numOfdaysPastSinceLastMonday = eval(d1.getDay()- 1);
		d1.setDate(d1.getDate() - numOfdaysPastSinceLastMonday);
		var weekNoToday = d1.getWeek();
		var weeksInTheFuture = eval( weekNo - weekNoToday );
		d1.setDate(d1.getDate() + eval( 7 * weeksInTheFuture ));
		var rangeIsFrom =  eval(d1.getMonth()+1)   +"/"  +  d1.getDate()  + "/"  +   d1.getFullYear();
		d1.setDate(d1.getDate() + 6);		
		var rangeIsTo = eval(d1.getMonth()+1)   +"/"  +  d1.getDate()  + "/"  +   d1.getFullYear() ;
		return rangeIsFrom + " to "+rangeIsTo;
};

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Posted By: tonyb on February 23, 2010

slightly modified to return array...

{... var range = new Array(); range[0] = rangeIsFrom; range[1] = rangeIsTo; return range; }

Then call from another function... {... var range = getDateRangeOfWeek(week-1); var first = new Date(range[0]); var second = new Date(range[1]); ...}

Posted By: SimonJ621 on June 23, 2010

You could add a date offset as a parameter. Something like this ...

function getDateRangeOfWeek(weekNo,dayOffset) { dayOffset = typeof(dayOffset) == 'int' ? dayOffset : 0; var d1 = new Date() numOfdaysPastSinceLastMonday = eval(d1.getDay() - dayOffset); ... }

0 = Sunday 1 = Monday 2 = Tuesday etc.

Posted By: SimonJ621 on June 23, 2010

You could add a date offset as a parameter. Something like this ...

function getDateRangeOfWeek(weekNo,dayOffset) { dayOffset = typeof(dayOffset) == 'int' ? dayOffset : 0; var d1 = new Date() numOfdaysPastSinceLastMonday = eval(d1.getDay() - dayOffset); ... }

0 = Sunday 1 = Monday 2 = Tuesday etc.

Posted By: SimonJ621 on June 25, 2010

I've also had to change the following from my previous comment (2 comments :/)

change dayOffset = typeof(dayOffset) == 'int' ? dayOffset : 0;

to dayOffset = typeof(dayOffset) == 'number' ? dayOffset : 0;

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